Trace determination of lead(II) ions by using a magnetic nanocomposite of the type Fe3O4/TiO2/PPy as a sorbent, and FAAS for quantitation

Mehdinia, Ali; Shoormeij, Zeynab; Jabbari, Ali

doi:10.1007/s00604-017-2156-9

Cited by 34 publications

(6 citation statements)

References 33 publications

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“…The LODs and LOQs are in the ranges of 0.13−1.1 and 0.42−3.6 ng/L, respectively. The LODs are lower than that obtained in magnetic SPE (MSPE)-inductively coupled plasma optical emission spectrometry (ICP-OES), 21−23 MSPE-ICP-flame atomic absorption spectrometry (ICP-FAAS), 24,25 and solid-phase microextraction (SPME)-ICP-mass spectrometry (ICP-MS). 26 It also can be seen from the data that the precision is satisfactory, with RSDs varying from 2 to 9%.…”

Section: ■ Results and Discussionmentioning

confidence: 83%

Highly Permeable Monolith-based Multichannel In-Tip Microextraction Apparatus for Simultaneous Field Sample Preparation of Pesticides and Heavy Metal Ions in Environmental Waters

et al. 2019

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A portable multichannel in-tip microextraction-based field sample preparation (FSP) apparatus was developed using polymer-based monoliths as an extraction phase. The construction of the FSP device is quite facile and convenient. More specifically, according to the chemical properties of studied analytes, functional-rich and high-permeability monoliths were in situ synthesized in pipet tips. After that, three tips containing the sorbents were mounted to three syringes, which were connected to a screw motor employed to drive the syringes and accurately regulate the flow rates in the adsorption and desorption stages. Because of the multifunction groups in the monoliths, the sorbents displayed satisfactory coextraction performance for pesticides (carbamates and triazoles) and heavy metal ions (Cd2+, Pb2+, and Cu2+) under the optimized conditions. The practicability of the proposed apparatus was demonstrated by the quick and simultaneous FSP of studied analytes in various environmental waters and combined with high-performance liquid chromatography/diode-array detection (for pesticides) and atomic absorption spectrometry (for metal ion) analysis. The results indicated that the limits of detection for the pesticides and metal ions were in the range of 0.36 to 1.2 ng/L and 0.061 to 0.40 ng/L, respectively, with ideal coefficients of determination. Furthermore, the results obtained with the constructed device were quite comparable to those obtained with the traditional laboratory extraction process, which demonstrated that the newly developed apparatus possesses the expected application in the high-throughput FSP of pesticides and heavy metal ions in water samples.

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Section: ■ Results and Discussionmentioning

confidence: 83%

Highly Permeable Monolith-based Multichannel In-Tip Microextraction Apparatus for Simultaneous Field Sample Preparation of Pesticides and Heavy Metal Ions in Environmental Waters

et al. 2019

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“…The percentage of adsorbent dosage increased from 0.01 to 0.04 g, and a further increase in the adsorbent dosage from 0.04 to 1 g had no effect on the percentage of Pd (II) adsorption. The reason is an overdose of the adsorbent, while the number of active centers of the adsorbent remains constant [22,23]. The result of the analysis shows that the best amount of adsorbent is 0.04 g at an adsorption percentage of 86.7.…”

Section: Effect Of the Adsorbent Dosagementioning

confidence: 99%

A new adsorbent for Pd (II) ions from aqueous solutions using diphenylphosphine with magnetic properties

Naini¹,

Kalal²,

Almasian³

et al. 2022

Preprint

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The aim of this study was to remove palladium ions from aqueous media in a batch operating system. A newly synthesized magnetic Fe3O4/SiO2/OPPh2 (diphenylphosphinite) nanocomposite was used as the adsorbent. This nanocomposite was examined by Fourier transform infrared, thermogravimetric analysis and X-ray spectroscopy methods. The factors that influence the adsorption equilibrium were examined, such as pH value, adsorbent dosage, metal concentration, adsorption time, temperature, influence of desorption solutions, concentration of the desorption solution and the influence of the ions present at the same time, namely Cd2 +, Ni2 +, Ca2 +, Co2 +, Fe3 +, Ba2 + and Pt4 + were determined based on the adsorbent used (Fe3O4 / SiO2 / OPPh2). Under optimal conditions and at the same concentrations, the interfering ions have only a very slight influence on the Pd (II) uptake. It was found that the fit isotherm is the Fritz-Schlunder model. The best possible model was determined in advance on the basis of seven error functions. Thermodynamic parameters indicate the endothermic, irreversible and non-spontaneous nature of the adsorption.

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“…The mixture of HNO 3 :H 2 O 2 (9:3 mL) was added to (0.25 g) of the sample and digestion was performed for 4 h at 80 °C. The final residue was cooled to room temperature and filtered 23 .…”

Section: Real Samplesmentioning

confidence: 99%

Preparation of a magnetic polystyrene nanocomposite for dispersive solid-phase extraction of copper ions in environmental samples

Mehdinia

Salamat

Jabbari

2020

Sci Rep

Self Cite

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the core shell nanostructure of magnetic polystyrene (pS@fe 3 o 4) was prepared and its physic-chemical properties were studied ft-iR, SeM, teM, VSM and Bet + BJH. the new adsorbent was applied in the dispersive solid phase extraction technique for measuring copper ions in water, Soil and oyster samples. Analysis is carried out using a flame atomic absorption spectrometry system. Effective parameters on extraction efficiency, such as pH of extraction solution, sorbent dosage, contact time, concentration and volume of desorption eluent and desorption time were optimized using one at a time method. n 2 adsorption-desorption experiment resulted in high BET surface area (32.002 m 2 g −1) and large pore volume (0.1794 cm 3 g −1) for pS@ fe 3 o 4 nanocomposite. Under the optimum conditions, a calibration curve within the range of 5-40 ng mL −1 with an appropriate coefficient of determination (R 2) of 0.9946 was obtained. Preconcentration factor (PF) and limit of detection (LOD) were found to be 55 and 1.6 ng mL −1 , respectively. the repeatability and reproducibility for three replicate measurements at the concentration of 25 ng mL −1 were 2.5%-1.4%, respectively. The Freundlich adsorption isotherm and pseudo-second-order kinetic model were consistent to experimental data in adsorption mechanism study. The maximum adsorption capacity was 19.56 mg g −1 for Cu (II). Finally, the efficiency of the method was investigated for analysis of the copper in environmental samples and good relative recoveries (RR%) were obtained within the range of 99.2% to 101.2%. Environmental pollutants are one of the most important global challenges that cause the destruction of natural ecosystems. The development of industry, power plants, mining industries as well as agricultural activities helps to increase environmental pollutants in different forms and concentrations 1. Among these pollutants, heavy metals which enter the environment through industrial activities, natural deposits, plating plants, mining and alloy production 2 are important. The presence of heavy metals has adverse effects such as high blood pressure, speech disorders and memory loss on human health 3. High concentrations level of copper ions, as one of the environmental pollutants, cause cancer of the lungs, gastrointestinal and mucous irritation, liver and kidney problems 4. The high concentrations of copper ions in biological systems (more than 0.15 mg L −1 for fish and 0.01 mg per liter for invertebrates) can be fatal. In the agricultural sector, copper has the role of regulating the growth and reproduction of plants, and optimizing the amount of this element is important because copper deficiency can have adverse effects on photosynthesis, reproduction, protein formation and auxin regulation 5. Due to the fact that heavy metals are very stable and soluble, they can be absorbed by living organisms, so the removal of these metals is of great importance. Various methods e.g. membrane filtration, ion exchange, absorption, chemical precipitation, liquid-liquid extraction ...

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Trace determination of lead(II) ions by using a magnetic nanocomposite of the type Fe3O4/TiO2/PPy as a sorbent, and FAAS for quantitation

Cited by 34 publications

References 33 publications

Highly Permeable Monolith-based Multichannel In-Tip Microextraction Apparatus for Simultaneous Field Sample Preparation of Pesticides and Heavy Metal Ions in Environmental Waters

Highly Permeable Monolith-based Multichannel In-Tip Microextraction Apparatus for Simultaneous Field Sample Preparation of Pesticides and Heavy Metal Ions in Environmental Waters

A new adsorbent for Pd (II) ions from aqueous solutions using diphenylphosphine with magnetic properties

Preparation of a magnetic polystyrene nanocomposite for dispersive solid-phase extraction of copper ions in environmental samples

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